Telephone signal attachment.



W. F. MIKOLASEK.

TELEPHONE SIGNAL ATTAOHMENT.

APPLICATION FILED HA8. 9, 1909. 967,409; Patented Aug. 16,1910.

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WENCESLAUS F. MIKOLASEK, OFSGOTLANZD, SOUTH DAKOTA, ASSIGNOR OFONE-FIFTH T0 JOHN F. SCHMIDT, ONE-FIFTH TO FRANK L. WHEELER, ANDONE-FIFTH T0 PETIE O. STONEBRAKER, ALL OF SCOTLAND, SOUTH DAKOTA.

TELEPHONE SIGNAL ATTACHMENT.

Specification of Letters Patent.

Application filed March 9, 1909.

Patented Aug. 16, 1910. Serial No. 482,277. r

To all whom it may concern:

Be it known that I, WENOESLAUS F. MI- KoLAsEK, citizen of the UnitedStates, residing at Scotland, in the county of Bonhomme and State ofSouth Dakota, have invented certain new and useful Improvements inTelephone Signal Attachments, of which the following is a specification.

This invention relates to telephony and refers particularly to what isknown as party line telephones.

An object of this invention is to signal any two or more connectedparties 011 the line upon the closing of the talking circuit throughanother party telephone, thereby producing a practically selectivesystem 011 a party line.

The invention has for another object the provision of a device whichwill. enable the.

usual ringing and talking circuits to be completed without anyadditional contrivances to be manipulated by the parties.

A further aim of the invention is the provision of a novel means formaking and breaking the contacts positioned within the telephone box anda novel arrangement of the contacts or switches by means of which theherein recited objects are effected.

A still further object of this in\"ention is the provision of a daslrpotof novel construction by means of which. the switches employed inconnection with this apparatus are operated automatically and positivelywithout jar, thereby producing the even closing of the several circuitsand reducing the wear incident to their operation.

Another and still further object of this invention is to so arrange asystem of contacts or switches that the ringing circuit in thetelephones of the parties using the line is opened upon the closing ofthe talking circuit thereby preventing the ringing of the telephonealready in operation.

For a full understanding of the inven' tion reference is to be had tothe following description and accompanying drawings, in which Figure 1is a section through a telephone box disclosing the improved arrangementof contacts employed by applicant showing the same in a normal position.Fig. 2 is a view of the same disclosing the contacts in posi-- tion uponthe removal of the receiver from the hook. Fig. 3 is a diagrammatic Viewof are held in the system of circuits employed in connection with theimproved telephone. Fig. 4: is a detail of the cushioning deviceemployed in operating the contacts.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

Referring to the drawings, the numeral 10 designates a baseboard orplate which is preferably formed of non-conducting material and which isadapted for positioning within a box 11 or casing which is usuallyemployed in connection with telephones. The base 10 is provided upon itsouter face near the upper edge thereof with leaf springs 12 and 13, thelatter being provided upon the outer extremity with a contact 14 and isadapted for normal engagement under the tension of the springs 12 and13. The springs 12 and 13 are transversely positioned across the face ofthe base 10 and parallel relation in such position by means of aset-screw '15 which is disposed through the inner extremities of thesame and terminated in a bracket16 outwardly extended from the face ofthe base 10. The springs 12 and 13, which are formed of electricconducting material are insulated from each other by means of strips ofhard rubber or a similar non-conducting material or composition 17 whichis interposed between the rear extremities of the springs 12 and 13 andupon the opposite outer faces thereof and held in such position by thepassage of the set-screw 15 therethrough, the set-screw 15 beingprovided with a coating of a non-conducting substance.

Intermediately and transversely positioned upon the base 10 at a spaceddistance below the bracket 16 is a second bracket 18 which is providedwith three leaf springs 19, 20 and 21 respectively, which are pro videdwith strips of insulated material 22 interposed between the innerextremities of the same and which are held in parallel relation by meansof a suitable set-screw 23. The intermediate spring 20 is provided uponits upper side adj acent the outer end thereof with a contact 24 whichis adapted for en gagement with the spring 21 and the spring 19 isprovided with a contact 25 formed upon the upper face of the same toengage normally the adjoining spring 20. The base 10 is further providedwith springs 26 and 27 which are positioned adjacent the lower edgethereof and which are mounted upon a bracket 28 by means of a set screw29, the inner ends of the springs 26 and 27 being insulated from eachother by the employment of strips of non-conducting material 30 whichare positioned between and upon the opposite sides of the same. Thespring 27 is provided with a contact 31 which is adapted to be engagedat times with the springs 26. The springs 12 and 13 which are mountedupon the base 10 are so positioned as to cause the contact 14 tonormally engage, and the springs 19 and 20 are so positioned to normallyengage the contact 25 carried upon the spring 19 with the lower face ofthe spring 20. The remaining contact points are held apart and arecaused to engage only upon the operation of a sliding rod 32 which ismade from non-conducting material and which is vertically and slidablypositioned in the box 11 and adapted for engagement with the forwardextremities of the springs 12, 20 and 27. The sliding rod 32 is adaptedto normally rest in a lowered position and is provided with theprojections 33, 34 and 35 which are adapted for engagement with theelongated extremities of the springs 12, 20 and 27, respectively, uponthe upward movement of the sliding rod 32. The sliding rod 32 isextended downwardly in the box and is connected to a piston rod 36 whichcarries upon its lower extremity a piston 37 reciprocally disposed in acylinder 38. The cylinder 38 is provided at its opposite extremitieswith outlet ports 39 and 40 which are adapted to admit of the gradualpassage of air from the cylinder 38 in order to cushion the operation ofthe sliding rod 32. The cylinder 38 is flanged at its lower extremity asat 41, which flange extends outwardly and supports the lower end of acoil spring 42 which is disposed about the cylinder 38 and extendedupwardly therefrom to engage with a pin 43 formed diametrically upon thepiston rod 36. The spring 42 is adapted to expand and to raise thesliding rod 32 to operate the springs disposed upon the base 10.

The box 11 is provided with an arm 44 which is pivotally mounted beneaththe same and extended at its outer extremity beyond the box 11 where itis forked as at 45' to support a receiver 46. The lever 44 is fulcrumedintermediately to the rod 32 and isadapted to depress the sliding rod 32upon the engagement of the receiver 46 upon the fork 45, the operationtakes place under the weight of the receiver 46. The sliding rod 32 isslidably positioned within the box 11 adjacent the outer extremities ofthe springs supported upon the base 10 by means of suitable lugs 47which are disposed upon the base 10.

The base 10 is secured within the box 11 in any suitable manner as byscrews 48 and is thus detachably positioned so that access may bereadily gained to the operative parts of the device.

For the purpose of sounding a signal upon the line, when the line isopened between two telephones, when a third party raises the receiver toenter upon the line, the springs 26 and 27 are connected to thetransmitter 49 through the medium of wires 50 and 51 respectively. Abuzzer 52 is disposed in the circuit formed with the wires 50 and 51 andis adapted for operation in conjunction with the transmitter to impartvibration in the receivers which are being employed. The transmitter 49is connected as usual to the primary coil through the wires 53 and 54,being energized by means of a. suitable battery 55 disposed in thecircuit, the wires 53 and being connected to an induction coil 56. Thesecondary coil of the induction coil 56 is extended at one extremitythrough a wire 57 to the main line 58 while its opposite extremity isconnected directly to the receiver 46. The receiver 46 is connected tothe spring 21 through the medium of a. conductor 59 and is adapted to beconnnunicatcd with a conductor 60 which is connected to the main line 63by means of the raising of the spring 20 under the operation of thesliding rod 32, the spring 20 being connected to the conductor 60. Bellmagnets 62 are disposed in the line and are connected between thesprings 13 and the main line wire 58 through the medium of a wire 64which terminates in the main wire 58. The main line wire 63 isconnected. to the spring 12 through a wire which isbranched from. thewire 63. A generator 71 is provided which is connected to the wire 60through a. wire 72 and is connected to the main line wire 58 through awire 73 which is connected between the same. The receiver -16 isconnected to the lower spring 19 through a wire 74 which is branched,one arm 75 of which leads to the receiver 46 while the opposite arm 7 6leads to the secondary of the induction coil 56. The battery 55 isprovided with a wire 77 which is provided with a contact which isadapted to abut the arm 44 when the same is raised.

The operation of the device is as follows :lVhen the line is closed andthe receiver 46 is hung upon the fork 45 to hold the sliding rod 32 in adownward position, the springs 12 and 13 will engage one another, byreason of their resiliency, and cause the contact 14 to close a circuitthrough the lines 63. This circuit is closed through the line wire 63,wire 70 to the spring 12, contact 14 to spring 13, thence to the bellmagnets 62 to the wire 64 to the main line wire 58. This circuit admitsof the ringing of the bells of the telephones which is effected by theoperation of the generator 71 of one of the telephones which causes a.current to flow through the main line wire 63 to wire 60 to generator 71through wire 72 then wire 73 to main line wire 58 to ring up the partieson the line. When two parties are using the line and a third partyattempts to open their telephone circuit, the arm 44 is raised by theremoval of the receiver 46 when the sliding rod 32 is carried upwardlyand forces the projection 35 past the spring 27. During the initialupward movement of the arm 44, to an extent equal to the distancebetween the contact 31 and the lower face of the spring 26, the arm 44is brought into engagement with the contact 57 and the following circuitis closed: the main line wire 63 through the wire 60 to spring 20, tospring 19 to wire 74. to the secondary coil of the induction coil 66,thence through wire 57 to lever 44 and out to main line 58. The currentthus forced through the secondary coil sets up an induced current in theprimary coil of the induction coil 56 which is carried through the wire53 to the transmitter 49, through the wire '54 to battery 55 and out towire 77 to the arm 44 where it passes to the wire 57 and back to theinduction coil 56. This operation closes the talking line of the thirdparty, by closing a circuit through the transmitter 49, with the twoparties on the line and enables the two parties to hear anything spokenby the third party but prevents the third party from hearingthe'conversation between the original two parties as the springs 20 and21 are out of contact and consequently the receiver circuit is open insuch third partys telephone. As the sliding rod 32 is moved upwardly,under the action of the spring 42, the spring 27 is carried upwardly toclose the call circuit passing through the same which will be sounded inthe receivers of the two parties using the line, but, owing to theseparation of the springs 26 and 27 in such parties telephones, thebuzzer 52 is sounded only in the third partys telephone as theprojection 35 is engaged with the spring 27 and is caused to close thecircuit through the buzzer 52. This causes the sounding of the buzzer 52in the third partys telephone to notify such party of the usage of theline, but only sounds in the receivers of the two parties, primarilyupon the line to notify them of the third partys entrance upon the line.After the call is given the sliding rod 32 is caused to continue in itsupward sliding movement when the projection 33 strikes the upper spring12 and raises the same from the contact 14 breaking the ringing circuithereinbefore set forth. hen the sliding rod 32 reaches its highest pointthe projection engages the central spring 20 and causes the contact 24;to engage the spring 21 thereby closing all three telephones to the lineenabling all three parties to talk and to hear one another.

This system enables two or more parties to talk privately over the wiresas the closing of another telephone in the line is signaled to suchparties using the line when their conversation may be abandoned if it isof such a nature that the parties holding conversation do not desire athird party to hear the same. This system also provides means wherebythe parties are signaled by the sounding of their call bell when theydesire to use the telephone if the line is already in use.

When thereceiver 1G is hung upon the hook or fork 15 the sliding rod 32is depressed and caused to consecutively open the receiver circuit,close the ringing circuit and finally to open the talking circuitrelative to such telephone and to close the same through the springs 19and 20 to the main line.

The sliding rods 32 throughout the line are so formed that theprojections 35 are of different formations so as to effect the diiferentcalls according to their respective telephones, thereby automaticallyoperating these several calls, the calls being effected by the holdingof the sprin 27 for different periods of time against the spring 26. Inthe drawings is shown a projection 35 which causes a call of one longand one short closing of the call. circuit effected by the forming ofthe lugs in different lengths, the upper or first lug to contact beingthe longer to produce the long call and the lower lug, which is shortercausing the short call.

Having thus described the invention what is claimed as new is 1. Adevice as specified comprising a base, leaf springs mounted in paralleland in insulated relation at the upper end of said base, said springsadapted for normal engagement to close a ringing-circuit in a telephoneline, a talking circuit three springs disposed in parallel and ininsulated relation intermediately of said base, the central of saidthree springs adapted for normal contact with the lowermost of saidthree springs to close said talking circuit, a buzzer circuit, twosprings disposed in parallel and in insulated relation at the lower endof said base to normally open the buzzer circuit for signaling in thetelephone line and means for actuating said springs to open the ringingcircuit, to close the buzzer circuit and to engage the central of saidthree springs with the uppermost of said three springs to close thecircuit through the receiver of the telephone, said means actuated bythe raising of the receiver from its normal position.

2. A device as specified comprising a base, three springs mounted inparallel and insulated relation intermediately of said base, the centralof said springs extended outadapted for normal engagement at their outerextremities, the upper of said springs extended outwardly, a pair ofsprings mounted in parallel and insulated relation at the lower end ofsaid base, the lower of said springs at the lower end of said base beingextended outwardly, all of said springs being connected to circuits in atelephone line, asliding rod reciprocally and vertically disposed onsaid base, projections carried by said sliding rod for engagement withsaid outwardly extended springs and a dash-pot carried by said base andconnected to said sliding rod for controlling the motion of the same.

3. A telephone switch comprising a box, a base detachably disposed insaid box, springs mounted in parallel relation upon said base, saidsprings being disposed in groups and being insulated from one another,elongated portions disposed on one spring in each group, a sliding rodmounted on said base, projections disposed on said sliding rod forengagement with said elongated portions, a cylinder mounted adjacentsaid box, apiston disposed in said cylinder, a piston rod carried bysaid piston and connected at its upper extremity to the lower end ofsaid sliding rod, a spring disposed about said cylinder, a flangeoutwardly extended from the lower end of said cylinder for supportingsaid spring, a pin disposed through said piston rod for engagement withthe upper end of said spring, and a forked lever mounted adjacent saidbox and pivotally engaged with said sliding rod for the reception of thereceiver of a tele phone.

4. A telephone system as specified comprising a base, springs mounted onsaid base adapted for engagement upon the raising of the receiver of thetelephone to close a buzzer circuit to the telephone line, springsdisposed on said base for normally opening a talking circuit through atelephone and s' rings mounted on said base adapted to c ose thetelephone circuit through the reeeiver.

5. A telephone having a switch for actuating consecutively the closingof a talking circuit, then the closing of a call circuit, the opening ofthe call circuit simultaneous with the opening of a ringing circuit andthe closing of a receiver circuit, and a receiver on the telephoneengaged with said switch to actuate the same upon the removal of saidreceiver.

6. In a telephone the combination of a switch comprising groups ofsprings, a sliding rod reciprocally disposed adjacent said springs,projections carried by said sliding rod for engagement with said springsto consecutively actuate the same upon the movement of said sliding rod,said springs forming the contacts of circuits in the telephone. meansfor causing the uniform vibration (it said sliding rod, and a receiverdetaehably connected to said sliding rod for regulating the position ofthe same.

7 In a telephone the combination of a switch for controlling thecircuits of the telephone, a reciprocating sliding rod mounted injuxtaposition to said switch for actuating the same, a piston rodconnected to said sliding rod, a cylinder :ulapted to receive saidpiston rod, a piston carried on said piston rod for reciprocation insaid cylinder, a flange annularly formed on said cylinder at the lowerend thereof, a helical spring mounted about said cylinder on saidflange, a pin carried by said piston rod for engagement with the upperend of said spring and a lever pivotally connected to said piston rodfor supporting a receiver thereon to normally depress the same, saidcylinder having apertures formed in the opposite ends thereof forregulating the vibrations of said piston.

In testimony whereof I afiix my signature in presence of two witnesses.

WENCESLAUS l". MIKOLASEK. [L- 8.]

Vitn esses F. D. rons, J. F. SCHMIDT.

